Question 1

Evolution of human appears parallel to the progressive development of brain and language skills. As such, the evolution of individual species in the sequence of their appearance is :

Accepted Answer

The evolutionary sequence of human species in the order of their appearance is: Ramapithecus (about 15 million years ago) Australopithecus (about 2 million years ago) Homo habilis (about 2 million years ago) Homo erectus (about 1.5 million years ago) Neanderthal man (100,000 - 40,000 years ago) Homo sapiens (75,000 - 10,000 years ago) Thus, the correct sequence is Ramapithecus Homo habilis Homo erectus Neanderthal Homo sapiens. Answer: Ramapithecus Homo habilis Homo erectus Neanderthal Homo sapi

Question 2

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Forelimbs of human and bats are homologous. Reason R : Forelimbs of humans and bat

Accepted Answer

Homologous organs are those which have the same fundamental anatomical structure and embryonic origin but may perform different functions. The forelimbs of humans and bats have the same basic structural plan, consisting of the humerus, radius, ulna, carpals, metacarpals, and phalanges. Because they share this similar anatomical structure, they are classified as homologous organs. Thus, Assertion A is true, Reason R is true, and Reason R is the correct explanation for Assertion A. Answer: Both A

Question 3

Which of the following is not evidence for evolution ?

Accepted Answer

Embryological support for evolution was proposed by Ernst Haeckel based on the observation of certain features during the embryonic stage common to all vertebrates that are absent in adults. However, this proposal was disapproved after careful study by Karl Ernst von Baer, who noted that embryos never pass through the adult stages of other animals. Therefore, the embryological support as proposed by Ernst Haeckel is not considered valid evidence for evolution. Divergent evolution (homology), con

Question 4

Sweet potato and potato represent a certain type of evolution. Select the correct combination of terms to explain the evolution.

Accepted Answer

Sweet potato is a root modification while potato is a stem modification but both of them have same function. Analogous structures are not anatomically similar structures though they perform similar functions. Analogous structures are the result of convergent evolution. - Homologous organs are anatomically similar but they do not perform similar function. Homologous organs are the result of divergent evolution.

Evolution — Previous Year Questions & Solutions